Theoretical P-Wave Travel Times


Theoretical P-wave Travel Times

This map shows the predicted (theoretical) travel times, in minutes, of the compressional (P) wave from the earthquake location to points around the globe. The travel times are computed using the spherically-symmetric IASP91 reference earth velocity model. The heavy black lines shown are the approximate distances to the P-wave shadow zone (103 to 140 degrees).

Theoretical P-Wave Travel Times
City Distance
Travel Time
Arrival Time
Brisbane, Australia 20.07 4:30.218:59:02.2P
Wellington, New Zealand 31.26 6:16.219:00:48.2P
Agana, Guam 31.77 6:20.719:00:52.7P
Honolulu, Hawaii 48.39 8:38.219:03:10.2P
Tokyo, Japan 52.36 9:08.219:03:40.2P
Beijing, China 67.9810:55.319:05:27.3P
Anchorage, Alaska 80.1512:06.419:06:38.4P
San Francisco, California 83.0312:21.619:06:53.6P
Los Angeles, California 85.0912:32.019:07:04.0P
Kathmandu, Nepal 86.3912:38.519:07:10.5P
Seattle, Washington 86.5412:39.219:07:11.2P
Phoenix, Arizona 89.9012:55.219:07:27.2P
Palmer Station, Antarctica 93.8613:13.419:07:45.4P
Albuquerque, New Mexico 94.6513:17.019:07:49.0P
Golden, Colorado 96.5413:25.619:07:57.6P
Mexico City, Mexico 98.7113:35.319:08:07.3Pdiff
Brownsville, Texas 101.1113:46.019:08:18.0Pdiff
Wichita, Kansas 102.4213:51.819:08:23.8Pdiff
Duluth, Minnesota 106.5014:09.919:08:41.9Pdiff
St. Louis, Missouri 108.0314:16.719:08:48.7Pdiff
Knoxville, Tennessee 112.1414:34.919:09:06.9Pdiff
Lima, Peru 113.9214:42.819:09:14.8Pdiff
Miami, Florida 116.6814:55.019:09:27.0Pdiff
Ottawa, Canada 118.0115:00.919:09:32.9Pdiff
Washington, D.C. 118.3015:02.219:09:34.2Pdiff
Philadelphia, Pennsylvania 119.5515:07.819:09:39.8Pdiff
Moscow, Russia 119.7215:08.519:09:40.5Pdiff
New York, New York 120.2715:11.019:09:43.0Pdiff
Boston, Massachusetts 122.0215:18.719:09:50.7Pdiff
Bangor, Maine 122.9115:22.719:09:54.7Pdiff
Nairobi, Kenya 127.3615:42.519:10:14.5Pdiff
Bergen, Norway 128.5615:47.819:10:19.8Pdiff
San Juan, Puerto Rico 129.8115:53.319:10:25.3Pdiff
London, England 137.9516:29.519:11:01.5Pdiff
Rome, Italy 141.1516:43.619:11:15.6Pdiff

Travel Time Information and Calculator

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver